The product is a set of assorted 1GB 2Rx8 PC2-5300U DDR2-667MHz desktop RAM modules from the brand RAM. These DDR2 FB-DIMM SDRAM modules have a form factor of DIMM and a bus speed of PC2-5300 (DDR2-667). The RAM modules are designed for use in desktop computers to increase memory capacity and improve performance. This product is ideal for upgrading or replacing existing memory modules in a computer system.